bidirectional jet flame igniter for aerosol fire suppression apparatus

ABSTRACT

The present invention relates to a bidirectional jet flame igniter for aerosol fire suppression apparatus, comprising igniter bracket ( 5 ) and igniter cup ( 6 ), wherein the igniter cup ( 6 ) is fixed in relation to the igniter bracket ( 5 ), and has ignition chemical agent ( 3 ) and ignition head ( 4 ) therein; the ignition head ( 4 ) is fixed at the center of the ignition chemical agent ( 3 ), and is connected with ignition head lead wire ( 1 ). Compared to that in the prior art, the flame igniter in the present invention has satisfactory air-tightness and moisture-proof performance, and can effectively protect the ignition chemical agent therein against vibrations; in addition, the flame igniter achieves synchronous bidirectional ignition.

FIELD OF THE INVENTION

The present invention belongs to the technical field of gas firesuppression, and relates to a bidirectional jet flame igniter,especially a bidirectional jet flame igniter for aerosol firesuppression apparatus.

BACKGROUND OF THE INVENTION

In aerosol fire suppression apparatuses, the design and reliability offlame igniter is of crucial importance to the functionality of theentire apparatus, wherein the species and amount of the chemical agentin an ignition pack, air tightness, water resistance, shock resistance,assembly of primary explosive, explosive molding process, and ignitionperformance must be considered, and vibration of the chemical agent inthe ignition pack must be prevented. Especially, for an apparatus thatjets aerosol in both directions, synchronization of ignition in bothdirections must be considered.

In the prior art, a bidirectional piezoelectric flame igniter isdisclosed in Patent Application No. JP56165832(A), and the flame igniteris designed to decrease the failure rate of electric flame igniter infire suppression apparatus; the structural characteristics of thepiezoelectric flame igniter are: A cam with two control parts and acontrol lever are arranged in the piezoelectric flame igniter, so thatthe ignition hammer is driven twice in a single ignition operation todischarge and ignite twice. However, such a flame igniter only decreasesthe failure rate of ignition partially but doesn't solve safety andsynchronization problems, and the structure is bulky and complex. Atpresent, in bidirectional horizontal jet aerosol fire suppressionapparatuses available in the domestic market, the ignition element stillemploys an ignition pack bound up with a transparent tape, with theignition chemical agent sealed in a zip-lock bag. There are many defectsrelated with ignition with such an ignition pack, for example, theloading of chemical agent in the ignition pack is not quantified, theair-tightness of the ignition pack is not satisfactory, the zip-lock bagmay fail easily in hot test, the initiation of ignition is notsynchronous, and the ignition effect is poor, etc. Moreover, in thetransportation process, the ignition pack may displace from the centralposition or break up due to vibrations, and therefore can't initiate theapparatus successfully. As a result, the apparatus can't be used tosuppress fire timely. In the 37 patent documents obtained by literaturesearching, the flame igniters are mainly used for safety gas bags (e.g.,CN86203126, CN200520011152.8, 8610332, 200610022391.2) or rocket engines(e.g., CN03218960.5; 200320103882.1, 200620147019.X), etc., and theignition is implemented by means of hot lithium electric ignition(CN96236373.1) or shock-wave ignition (CN00261694.7), etc.; all of thesedocuments don't involve the chemical agent and structural design offlame igniters for aerosol fire suppression apparatuses.

SUMMARY OF THE INVENTION

In view of the present situation in the prior art, the object of thepresent invention is to provide a bidirectional jet flame igniter foraerosol fire suppression apparatus that is simple in structure, safe andreliable, and easy to operate, to overcome the technical drawbacks ofexisting flame igniters for aerosol fire suppression apparatuses, suchas unsatisfactory air-tightness and failure in hot test, etc.

The technical solution of the present invention will be described asfollowing:

A bidirectional jet flame igniter for aerosol fire suppressionapparatus, comprising igniter bracket and igniter cup, wherein theigniter cup is fixed to the igniter bracket, and has ignition chemicalagent and ignition head therein; the ignition head is fixed at thecenter of the ignition chemical agent, and is connected with ignitionhead lead wire.

Furthermore, a tubular rivet is fixed at one end of the igniter cup andthe ignition head lead wire is fixed in relation to the tubular rivet.

Furthermore, a connecting piece is installed outside of the igniter cupand the ignition head lead wire is fixed in relation to the connectingpiece.

Furthermore, the wall of the igniter cup has external threads forscrewing with the connecting piece and the connecting piece is screwedtogether with the igniter cup.

Furthermore, the igniter cup has a volume of 4 cm³˜10 cm³.

Furthermore, the ignition heads comprise two ignition heads connected inshunt and the shunt resistance of the two ignition heads is within therange of 1.2Ω˜1.8Ω.

Furthermore, an igniter cap is fixed to the port on one end of theigniter cup and flame jets are arranged on the igniter cup and ignitercap.

Furthermore, 1˜100 flame jets are arranged on the igniter cup andigniter cap and the flame jets have a diameter of Φ10.1 mm˜Φ20 mm.

Furthermore, 5˜30 flame jets are arranged on the igniter cup and theflame jets have a diameter of Φ1 mm˜Φ5 mm.

Compared to that in the prior art, the flame igniter in the presentinvention has satisfactory air-tightness and moisture-proof performanceand can effectively protect the ignition chemical agent therein againstvibrations; in addition, the flame igniter achieves synchronousbidirectional ignition.

BRIEF DESCRIPTION OF THE DRAWINGS

Bidirectional jet flame igniter for aerosol fire suppression apparatusin the present invention will be further detailed with reference to thedrawings, to make the fore-mentioned advantages of the present inventionbe understood more clearly.

FIG. 1 is a schematic structural diagram of an example of thebidirectional jet flame igniter for aerosol fire suppression apparatusin the present invention;

FIG. 2 is a schematic structural diagram of another example of thebidirectional jet flame igniter for aerosol fire suppression apparatusin the present invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The present invention will be further detailed with reference to thedrawings.

FIG. 1 is a schematic structural diagram of an example of thebidirectional jet flame igniter for aerosol fire suppression apparatusin the present invention. As shown in FIG. 1, the bidirectional jetflame igniter for aerosol fire suppression apparatus comprises igniterbracket 5 and igniter cup 6 fixed to the igniter bracket 5, wherein theigniter cup 6 is made of a metal material, such as copper. A specificamount of ignition chemical agent 3 is filled in the igniter cup 6, andan ignition head 4 is installed at the center of the ignition chemicalagent 3; the ignition head 4 has specific resistance; in this example,the ignition head comprises two ignition heads connected in shunt, with1.2Ω shunt resistance. A tubular rivet 2 is fixed at the top center ofthe igniter cup 6, parallel ignition head lead wires 1 pass through thetubular rivet 2 and are connected to the ignition head 4; the ignitionhead lead wires 1 are fixed in relation to the tubular rivet 2. In thisexample, the distance from the ignition head 4 to the tubular rivet 2 is16 mm, the ignition head lead wires 1 are fixed to the tubular rivet 2with AB adhesive, and the tubular rivet 2 is bonded to the cup 6 with ABadhesive.

Furthermore, 30 flame jets in Φ1 mm diameter are arranged on the sidewall of igniter cup 6 and an igniter cap 7, and the igniter cup 6 arecoupled to the igniter cap 7 by means of mold closing.

In case of fire in the protective area, the control element of theaerosol fire suppression apparatus detects the fire signal, and theannunciator alarms automatically and switch on the power supply quickly;thus the ignition head 4 ignites the ignition chemical agent 3, and theflame spurt out of the flame jets on the igniter cup 6 from the limitedspace in the igniter cup 6 at high speed under gas pressure, creates anarrow and long flame in jet length more than 30 cm, and ignite theaerosol generating chemical agent in the bidirectional horizontal jetaerosol fire suppression apparatus, and thereby initiates the firesuppression apparatus.

FIG. 2 is a schematic structural diagram of another example of thebidirectional jet flame igniter for aerosol fire suppression apparatusin the present invention. As shown in FIG. 2, the bidirectional jetflame igniter for aerosol fire suppression apparatus comprises igniterbracket 5 and igniter cup 6, wherein the igniter cup 6 has externalthreads on its wall for screwing with a connecting piece 9, theconnecting pieced 9 is screwed together with the igniter cup 6, andignition head lead wire 1 is fixed in relation to the connecting piece9.

The igniter cup 6 can be made of a metal material, such as stainlesssteel. A specific amount of ignition chemical agent 3 is filled in theigniter cup 6, and an ignition head 4 is installed at the center of theignition chemical agent 3; the ignition head 4 has specific resistance;in this example, the ignition head comprises two ignition headsconnected in shunt, with 1.8Ω shunt resistance.

In addition, 30 flame jets in Φ1 mm diameter are arranged on the top ofthe igniter cup 6, and the port of the igniter cup 6 is sealed with asealing tin foil plate for moisture-proofing.

In case of fire in the protective area, the control element of theaerosol fire suppression apparatus detects the fire signal, and theannunciator alarms automatically and switch on the power supply quickly;thus the ignition head 4 ignites the ignition chemical agent 3, and theflame breaks through the tin foil plates on the two ends of the flameigniter and spurt out from the limited space in the igniter cup 6 undergas pressure, and ignites the aerosol generating chemical agent in thetwo ends of the bidirectional horizontal jet aerosol fire suppressionapparatus synchronously, and thereby initiates the fire suppressionapparatus.

Furthermore, the cup of the bidirectional jet flame igniter for aerosolfire suppression apparatus in the present invention has a volume of 4cm³˜10 cm³.

On the basis of the above instruction for the present invention, thoseskilled in the art can easily make modifications or variations to theembodiments without departing from the spirit of the present invention;however, all these modifications or variations shall be deemed asfalling into the protective scope of the present invention. Thoseskilled in the art shall appreciate that the above description is onlyprovided to elaborate and explain the object of the present invention,instead of constituting any confinement to the present invention. Theprotective scope of the present invention shall only be confined by theclaims and their equivalence.

1. A bidirectional jet flame igniter for an aerosol fire suppressionapparatus, comprising igniter bracket and igniter cup, wherein theigniter cup is fixed in relation to the igniter bracket, and hasignition chemical agent and ignition head therein; the ignition head isfixed at the center of the ignition chemical agent, and is connectedwith ignition head lead wire.
 2. The bidirectional jet flame igniter foran aerosol fire suppression apparatus according to claim 1,characterized in that a tubular rivet is fixed to one end of the ignitercup and the ignition head lead wire is fixed in relation to the tubularrivet.
 3. The bidirectional jet flame igniter for an aerosol firesuppression apparatus according to claim 1, characterized in that aconnecting piece is arranged outside of the igniter cup and the ignitionhead lead wire is fixed in relation to the connecting piece.
 4. Thebidirectional jet flame igniter for an aerosol fire suppressionapparatus according to claim 3, characterized in that the igniter cuphas external threads for screwing with the connecting piece and theconnecting piece is screwed together with the igniter cup.
 5. Thebidirectional jet flame igniter for an aerosol fire suppressionapparatus according to claim 1, characterized in that the igniter cuphas a volume of 4 cm³˜10 cm³.
 6. The bidirectional jet flame igniter foran aerosol fire suppression apparatus according to claim 1,characterized in that the ignition head comprises two ignition headsconnected in shunt and the shunt resistance of the two ignition heads iswithin the range of 1.2Ω˜1.8Ω.
 7. The bidirectional jet flame igniterfor an aerosol fire suppression apparatus according to claim 1,characterized in that an igniter cap is fixed to the port at one end ofthe igniter cup and flame jets are arranged on the igniter cup andigniter cap.
 8. The bidirectional jet flame igniter for an aerosol firesuppression apparatus according to claim 7, characterized in that 1˜100flame jets are arranged on the igniter cup and igniter cap and the flamejets have a diameter of Φ0.1 mm˜Φ20 mm.
 9. The bidirectional jet flameigniter for an aerosol fire suppression apparatus according to claim 1,characterized in that 5˜30 flame jets are arranged on the igniter cupand the flame jets have a diameter of Φ1 mm˜Φ5 mm.